Attaching 100mm ducting to 110mm soil outlet pipe

[bigglesuk]

Hi,

My air ventilation output pipe for the bathroom in my flat is 110mm soil pipe. This length piping is only used by the extraction fan. I'm changing the fan and the position of it which is 100mm piping. Thing is, how do I connect if to the 110mm pipe, the way the previous people did it is errrr... codged and not sealed properly.

Think I need some form of 100mm -> 110mm adapter, can you get them?

Thanks,

Adam

 

[doitall]

The 100mm fits snuggly inside the 110 soil pipe, you just seal it with duct tape.

 

[bigglesuk]

The only thing is that the pipe goes straight up out through the roof. I've read that you should put a condensation trap in if the pipe is vertical. So I'm worried that condensation may leak into the loft where the join is taped together.

 

[doitall]

The only thing is that the pipe goes straight up out through the roof. I've read that you should put a condensation trap in if the pipe is vertical. So I'm worried that condensation may leak into the loft where the join is taped together.

Thats called lateral thinking I'm told.

Where does the water go if you could made a watertight joint, thats correct it drips out of the ceiling